Full Blood Count (FBC) Test

A full blood count measures your red blood cells, white blood cells and platelets from one sample. It is the most requested private blood test in the UK and a sensible first step for tiredness, recurrent infections, bruising or a general health check. The test costs £63.75 plus the £50 phlebotomy fee, and results are usually available in 1 day.

No fasting or special preparation is needed. You can self-request the test, book online or walk in to 117a Harley Street seven days a week.

What does a full blood count measure?

It measures the three main cell lines in blood: red cells and haemoglobin, white cells with a breakdown by type, and platelets.

Do I need to fast before an FBC?

No. There is no fasting or other preparation for a full blood count. Drink water as normal before your appointment.

How quickly do FBC results come back?

Results are usually available in 1 day and are sent to you by email.

What can an abnormal FBC show?

Low haemoglobin can point to anaemia, a raised white cell count can suggest infection or inflammation, and platelet changes can affect clotting. Any abnormal result should be reviewed with a clinician.